Taylor Swift wasn’t scheduled to perform on The Tonight Show Starring Jimmy Fallon on Monday night (November 13), but she did it anyway – as a tribute to Jimmy Fallon and his late mother, who died earlier this month.

“First, a quick word about Taylor Swift. She was not scheduled to do our show today. But we wanted something special for this first show back, so we asked her on a complete whim, since she had been in town doing SNL. She said yes with zero hesitation,” he wrote on Twitter.

“She sang ‘New Year’s Day.’ No one had heard it. Suddenly she sings the line, ‘Squeeze my hand 3 times in the back of the taxi.’ I nearly gasped. Tears. I think everyone in the audience started sobbing. I could see Jimmy silhouetted at his desk dabbing his eyes with a tissue. We all lost it. It was a beautiful coincidence in a beautiful performance. ‘Hold on to your memories, they will hold on to you,’ Taylor sang.”

“That hug between Jimmy and Taylor after the song was 100% real emotion. Whatever you think of Taylor, she did something beautiful for Jimmy and our show today, and we’re forever grateful.”

See his tweets below.

She sang “New Year’s Day.” No one had heard it. Suddenly she sings the line, “Squeeze my hand 3 times in the back of the taxi.” I nearly gasped. Tears. I think everyone in the audience started sobbing.